It is a bit freaky. I think they changed the name of the virus in the book like in 2009.
The novel mentions a bioweapon that in earlier editions is called "Gorki-400" and in later editions was called "Wuhan-400". Gorki is a Russian city and named as the origin of that bioweapon in the 1981 edition. Due to the end of the Cold War, the origin of the bioweapon was changed to the Chinese city of Wuhan and it was renamed "Wuhan-400" for the 2008 edition onward,[4][5] prompting speculation from some in early 2020 that Koontz had somehow predicted the Coronavirus disease 2019.[4][6][5][7]